import java.util.Scanner;

public  class Main {
  public static void main(String[] args) {
    Scanner sc = new Scanner(System.in);
    String s = sc.next();
    int cnt = 0;
    int max  = 0;
    for (int i = 0; i < s.length(); i++) {
        if (s.charAt(i) == '…') {
           cnt++;
        } else {
          max = Math.max(cnt, max);
          cnt = 0;
        }
    }
    System.out.println(max);
  }
}